Borrelia burgdorferi is the bacterium spread by ticks and associated with the bull's eye rash in Lyme disease.
Borrelia burgdorferi is spread by ticks and is sometimes identified by a bull's eye rash around the tick bite. This bacterium is the causative agent of Lyme disease, which can lead to chronic disorders if left untreated. Ticks infected with Borrelia burgdorferi can transmit the bacterium to humans through bites.
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